I always recommend CarMax for buying used cars. I have bought three from two different CarMax shops near me and could not be happier with the staff and the process.Plus you can get an amazing ext warranty with the car that covers virtually everything for up to 5 yrs / 100k miles from the day you drive it home. They can transfer any car to a shop near you and they don't offer cars with problems.
In fact, I just checked for you. There is an M35x with surround sound, NAV, AFS headlamps, and radar cruise. Also has the aluminum pedals, two-color interior, and only 52k miles. It is a FL car so no worries about road salt, etc. Looks like the last owner Plasti-Dipped the grille and emblems but you can peel that right off if you don't fancy the looks.
http://www.carmax.com/enus/view-car/def ... lts%20page